Construction and mining equipment, focused on the creation of holes and wells, is equipped with special nozzles. Depending on the nature of the operation performed, this can be a small drill or a massive crown. The most complex, responsible and large-scale events can be performed by a drill bit, which can have different parameters. The advantages of such equipment include a high degree of performance, mechanical reliability and versatility. Although, of course, a drill with certain properties is used for each type of work.
Drill bits designation
Most often, the largest representatives of this class of nozzles are used in the mining industry. A high degree of wear resistance and destructive effect, supported by the power capacities of the main equipment, allows the tool to cope with the drilling of solid rock. But the construction area is not complete without this type of equipment. In particular, the drill bit is included in the package of some types of perforators and even multi-function screwdrivers with impact function. Another thing is that in this case both the size and operational capabilities of the crown are less high than in models designed to work with rocks.
It is important to note the ability of crowns to work with specific materials. The same punchers in powerful versions cope with concrete and some rocks. Typically, a drill bit for such tasks is included in the machine perforating machines, which can be used to create large-format holes in the walls.
Varieties
Crowns are divided according to several principles, including designation and constructional design. As for the purpose, conventionally used conditional separation into equipment for concrete, diamond elements and drilling rigs based on carbide metals. The structural device of carbide elements is also divided into three groups. The first is a segment of ribbed crowns that are characterized as non-abrasive or finely abrasive. As a rule, drilling equipment with such equipment is used in work with clay, limestone, peat, marl and other soil compositions. The second category is incisor crowns, which are considered monolithic and low abrasive. Such a tool is used in the processing of clay and sand shale, limestone and dolomites. And the third group is self-sharpening crowns with a monolithic and abrasive surface. Silvites, diorites and conglomerates are treated with such a drill.
Features of diamond crowns
The use of diamond segments in drills and crowns is considered the most promising direction in the mining and construction industries. Firstly, this is due to the increased resistance of the material itself, which has practically no restrictions in terms of processing. Secondly, the durability and low wear of the cutting segments of this origin makes the use of a diamond structure economically justified. Today, diamond drill bits are used in all areas where the formation of wells of one kind or another is required. The advantages of such equipment also include flexibility in terms of operating conditions. For example, drilling technology allows the use of a crown for underwater operations while maintaining a fairly high degree of productivity.
Specifications
One of the main parameters of the crown is the correspondence to one or another shank. In particular, models that interact with cylindrical, hexagonal and SDS-max shank types are distinguished. It is important to note that a certain size is suitable for each type of cartridge. For example, drill bits from 20 mm are combined with the universal SDS-max system. The total range for this value varies from 8 to 150 mm. A significant characteristic is the cooling method. Typically, nozzles are divided by the ability to implement one of the drilling methods - wet or dry. Using the first method provides for the supply of water during the operation - this ensures the cooling of the element and the removal of slag with dust. Refusal of the system of external cooling during dry drilling simplifies the organizational process of the operation, but reduces the technical resource of the crown.
Crown manufacturers
High-quality general-purpose crowns are manufactured under the brands Dewalt, Bosch, Makita, etc. These manufacturers occupy a tight position in the construction market, endowing their products with advanced technological advantages. The professional segment is represented by Elitech, Kraftool and MATRIX. In the lines of these brands you can find large-format nozzles, which, in particular, complement drilling equipment in the mining industry. Good on the characteristics of the crown and produce domestic enterprises, including Interskol, Bison, Enkor, etc.
The nuances of the operation of crowns
The key to success of high-quality drilling is formed at the preparation stage. The user must check the working equipment, select the crown suitable for the planned operation and stock up on the necessary consumables. It is advisable to directly implement the workflow using the wet method. For example, carbide drill bits more efficiently perform their task with a plentiful supply of water. But one should not be particularly zealous with liquid filling, otherwise there will be a risk of slowing down the rotation of the element.
How to choose a suitable crown?
Pay attention to the material of manufacture, technical parameters and, in particular, size, as well as structural features. As for the material, standard carbide tools are suitable for the simplest operations, and it is advisable to work with concrete or brick with diamond segments. The diameter is selected strictly in accordance with the requirements for the result. At the same time, it is not recommended to give preference to cheap equipment. As a rule, the price of a high-quality drill bit costs about 1-1.5 thousand rubles. Moreover, this is not much higher than the cost of cheap products from little-known manufacturers, which can be 700-800 rubles. A high-quality high-quality crown will justify this overpayment due to a longer operational period and the effectiveness of abrasive-destructive effects.
Conclusion
Work on drilling and drilling of solid-state materials is required not only in specialized professional fields. Even a home rotary hammer in many versions supports combination with such nozzles. Another thing is that it is more likely to be a small diameter drill bit. In the household, the presence of such a tool may be required in the case of repair of utility systems. For example, if you plan to lay plumbing or heating channels through the wall. Small-sized crowns are also useful for creating small holes in the same concrete in order to organize the electrical infrastructure.